Effect of systemic diseases on clonal integration: modelling approach

被引:12
作者
Koubek, Tomas [1 ]
Herben, Tomas [2 ]
机构
[1] Charles Univ Prague, Dept Bot, Fac Sci, CZ-12801 Prague 2, Czech Republic
[2] Acad Sci Czech Republic, Inst Biol, CZ-25243 Pruhonice, Czech Republic
关键词
clonal plants; disease spread; resource translocation; systemic pathogens; spatially explicit modelling;
D O I
10.1007/s10682-007-9219-z
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Systemic disease spread has been suggested as a possible disadvantage of clonal plant integration. As connected ramets have higher risk of being infected, disease should cause a selective pressure against clonality. Since experimental tests of this hypothesis are not easy to perform, we chose a modelling approach, by which we could easily separate different factors influencing the process. We used a spatially explicit model of clonal growth with disease spread implemented and we tested the hypothesis that systemic disease decreases the competitive ability of highly integrated clonal plants when compared to less integrated plants with the same parameters. In contrast to our expectations, the integrator was competitively stronger than the splitter in most cases and it lost only when the disease severity and infection rates were very high. We think that the larger the integrated network is, the better the plant utilises its translocation ability. Even a very small amount of resource sharing greatly increased the relative success of the integrator and larger integrators were competitively stronger than the smaller ones. Our results also indicate that although the same infection rate caused more systemic disease in the integrator than in the splitter population, the disease has only a limited potential to select for the splitter strategy. This is caused not only by the advantages of the clonal integration but also by the fact that there is only a small range of infection rates at which there is sufficient difference in disease impact between the strategies.
引用
收藏
页码:449 / 460
页数:12
相关论文
共 44 条
[1]   DISEASE SPREAD AND POPULATION-DYNAMICS OF ANTHER-SMUT INFECTION OF SILENE-ALBA CAUSED BY THE FUNGUS USTILAGO-VIOLACEA [J].
ALEXANDER, HM ;
ANTONOVICS, J .
JOURNAL OF ECOLOGY, 1988, 76 (01) :91-104
[2]   Nutrient sharing in natural clonal fragments of Fragaria chiloensis [J].
Alpert, P .
JOURNAL OF ECOLOGY, 1996, 84 (03) :395-406
[3]  
[Anonymous], 1987, Disease and plant population biology
[4]  
Brunt A.A., 1996, Plant viruses online
[5]   Vascular invasion routes and systemic accumulation patterns of tobacco mosaic virus in Nicotiana benthamiana [J].
Cheng, NH ;
Su, CL ;
Carter, SA ;
Nelson, RS .
PLANT JOURNAL, 2000, 23 (03) :349-362
[6]   Evolution and stasis in plant-pathogen associations [J].
Clay, K ;
Kover, P .
ECOLOGY, 1996, 77 (04) :997-1003
[7]   The effects of plant population size on the interactions between the endangered plant Scorzonera humilis, a specialised herbivore, and a phytopathogenic fungus [J].
Colling, G ;
Matthies, D .
OIKOS, 2004, 105 (01) :71-78
[8]  
Cook R. E., 1985, POPULATION BIOL EVOL, P259
[9]   Physiological integration of the clonal plant Carex arenaria and its response to soil-borne pathogens [J].
D'Hertefeldt, T ;
van der Putten, WH .
OIKOS, 1998, 81 (02) :229-237
[10]   The rust pathogen Triphragmium ulmariae as a selective force affecting its host, Filipendula ulmaria [J].
Ericson, L ;
Burdon, JJ ;
Müller, WJ .
JOURNAL OF ECOLOGY, 2002, 90 (01) :167-178